Sign: Something that someone else can see or measure. (rash, sweating, shaking, high/low blood pressure, fever)

Symptom: Something that is felt. (sore throat, cramping, dizziness, pain)

Acute: Disappears quickly, short lived.

Chronic: Sticks around for a long time.

Casual: Data proof that something caused something else. (HIV causes AIDS)

Coincidental: Two things that can be present at the same time, but are not necessarily related. (smoking and having lung cancer)

Prevention: (taking vitamins, eating right)

Treatment: (medicine)

Morbidity: How often a disease occurs.

Mortality: How often a disease causes people to die.